The example of Potential energy is the water behind a dam.
Due to its higher elevation than the water on the other side of a hydroelectric dam , the water behind one stores gravitational potential energy. This potential energy is transformed into kinetic energy when the water falls, turning turbines to produce electricity.
The water held behind the dam has Potential Energy because of its position water in the reservoir is on height and when something is on a certain height the Potential Energy P.E. increases.
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Please help me! This is due in 10 minutes, WILL GIVE BRAINLIEST!
Acrylonitrile and ethyl acetate have the same boiling point: 77.2ºC. In one to two sentences, explain what outcome you would expect if a mixture of these two substances were distilled
Answer:
Acrylonitrile and ethyl acetate will be collect together since they both have the same boiling point. The method of distillation between the boiling points of the acrylonitrile and ethyl acetate. Since they have the same boiling point the two substances turn into vapor at the same temperature and are collected simultaneously. Hence separation is not achieved by distillation
Explanation:
UwU
have a nice day!
Mylie~
identify the properly written and balanced equation for the precipitation reaction between potassium phosphate and magnesium sulfate.
The reaction is double displacement reaction of potassium phosphate and magnesium sulfate between balanced equation for the precipitation reaction is
2 K3PO4 + 3 MgSO4 → Mg3(PO4)2 + 3 K2SO4
Here reaction is between potassium phosphate and magnesium sulfate we have to understand the balance chemical equation. precipitation reactions are double displacement reactions in which the conversion of a solution into solid by converting the substance into insoluble form or by making the solution a super saturated one. here the reaction is two mole of aqueous tribasic potassium phosphate react with three mole of aqua magnesium sulphate to form one mole of solid farringtonite and three mole of aqueous potassium sulphate this is balanced chemical reaction of potassium phosphate and magnesium sulfate.
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What is the number of grams in one mole of(a) hydrogen gas (a diatomic element),(b) helium,(c) carbon monoxide, and(d) water.
Given:
Mole = 1
Formula:
Moles = Given mass / Molar mass
a) Molar mass of hydrogen = 2.016
Mass = 1 * 2.016
Mass = 2.02g
b)Molar mass of Helium = 4
Mass = 1 * 4
Mass = 4g
c)Molar mass of carbon monooxide = 28
Mass = 1 * 28
Mass = 28g
d)Molar mass of water = 18
Mass = 1 * 18
Mass = 18g
The substance's intense property, the molar mass, is independent of the sample's size. The coherent unit of molar mass in the SI is kilograms per mole (kg/mol). Molar masses are, however, virtually generally given in g/mol due to historical considerations.
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Formation of hydrogen bonds requires hydrogen atoms and what else? polar covalent bonds water ionic bonds oxygen
Formation of hydrogen bonds require hydrogen atoms and Oxygen atoms, fluorine atoms, or nitrogen atoms.
Hydrogen bond is a special case of dipole-dipole force of attractions. Here there are two polar molecules in which one of them has hydrogen atom with partial positive charge on it and the other molecule can be O, F or N with partial negative charge. Since, these dipole-dipole force of attractions are stronger than other dipole-dipole force of attractions we name it as Hydrogen bonds.
Some of the examples where hydrogen bonding is present are- H₂O, HF, NH₃ etc
Since, Hydrogen bonds are a type of dipole-dipole forces of attraction, they are present in polar covalent molecules.
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List 4 kinds of hazards that are caused by Volcanoes.
Four kinds of hazards that are caused by the volcanoes are lava flow, floods or tsunami, landslides, and volcanic earthquakes.
Volcanoes emits the hot, dangerous gases, ash, lava, and rocks which can be powerfully destructive. People have been dying from the volcanic blasts. Volcanic eruptions results in the additional menances to the health, such as floods, power outages, water contamination, and wildfires.
Ash exposure can be harmful to infants, elderly people, and people with respiratory conditions such as asthma, emphysema, and other chronic lung diseases.
Hazards such as -
Earthquakes such as preparing for, surviving, and recovering from an earthquake. Floods such as making sure food and water are safe, cleaning up, and emergency supplies. Landslides and Mudslides such as protective measures to take before, during, and after a landslide or debris flow. Power outages such as carbon monoxide poisoning, alternative heat and energy sources, downed power lines, and food and water safety. Wildfires such as smoke inhalation and other wildfire hazards.
Sources
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he famous miller–urey experiment was conducted in 1953. this experiment tested the hypothesis that primitive earth conditions were favorable for creating complex organic compounds from simple compounds. classify the compounds according to whether they were inputs or outputs in this experiment.
Answer:
C
Explanation:
iron undergoes an allotropic transformation at 912°c: upon heating from a bcc (???? phase) to an fcc (???? phase). accompanying this transformation is a change in the atomic radius of fe—from rbcc
When iron undergoes an allotropic transformation at 912°c: upon heating from a bcc to an fcc , accompanying this transformation is a change in the atomic radius of fe—from 0.4330a to 0.353a, where a is the edge length of the cubic unit cell.
What is latent heat?The heat energy required for the change of phase of any substance is known as latent heat of that substance for a particular change of phase or process.
Iron changes from a bcc to an fcc at 912 °C, and this allotropic transformation is accompanied by a shift in the atomic radius of fe from 0.4330 a to 0.353 a, where an is the edge length of the cubic unit cell.
Thus, there would be a shift in the atomic radius of iron from 0.4330 a to 0.353 a.
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The variables for this experiment include mass, volume and the materials in the various balls, as well as their
densities. In Part II, you will be comparing an inflated football with a deflated one. Use the drop-down menus to
complete the sentences and identify the independent and dependent variables.
The mass of air inside the balloon is an independent variable, whereas the balloon's volume is a dependent variable.
When compared to the deflated balloon, the expanded balloon has a bigger capacity.
The following are some of the variables connected to the inflated and deflated balloons:
volume of the balloon and the amount of air inside it
The amount (mass) of air inside the balloon determines the balloon's volume.
What are dependent and independent variable ?There are often two different sorts of variables in analytical health research. We anticipate that independent variables will have an impact on dependent variables. What occurs as a result of the independent variable is referred to as a dependent variable.
As a result, we can say that the balloon's volume is a dependent variable and its air mass is an independent variable.
The balloon's volume grows as the volume of air inside it does.
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why is it important to know what substances you have available to work with, and how they might change when you developing special effects
Editing and VFX software has advanced to the point where the only limitations are your technical skills and your imagination
Although they are distinct, special effects and visual effects are frequently confused. There are further categories, however special effects are frequently manufactured artificially on set and are known as practical effects (for example, a controlled explosion in an action scene). On the other side, visual effects are produced in the editing room or post-production. While modern visual effects deal with animation, computer generated imagery (CGI), and other post-production effects, early visual effects saw filmmakers experimenting with film stock.
Each has advantages and disadvantages. According to filmmaker Steven Bernstein, special effects are frequently preferable because they allow actors to react to the effects in real time. They also provide lighting effects and other characteristics that would otherwise need expensive computer creation.
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Hazardous gas released from a factory’s smokestack is an example of __________ externality. a. local b. positive c. resource d. negative
Answer: D. negative
Explanation:
15.91 kilometers to meters
Answer: 15910 meters
Explanation:
1 kilometer = 1000 meters
15.91 kilometers * 1000 meters/1 kilometer =
15.91 * 1000/1=
15.91*1000=15910 meters
a sample of sodium bromide, nabr, contains 22.34% sodium. if the sample was contaminated with sodium chloride, nacl, would the mass percent of na in the contaminated sample be higher or lower than the pure sample? justify your claim.
In a sample of sodium bromide, NaBr contains 22.34% of sodium. If the sample was contaminated with sodium chloride, NaCl, then the mass percent of Na in the contaminated sample would be higher than the pure sample.
Mass percent can be determined by the formula:
Mass percent = (mass of substance/Total mass of the sample) × 100
The sample contains NaBr which has 22.34 g of Na in 100g of the sample.
If only NaBr was added then, the mass percent would not increase as the the amount of increase in Na is same as the increase in the amount of total sample.
But, NaCl is added as a contaminant so the increase in amount of sample is more than the increase in amount of total sample because the mass of Cl is is less as compared to Br. so, mass percent increases on contamination of NaBr with NaCl
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What state
of matter has a defined volume but undefined shape?
which of the following sentences is the correct way to answer the following question te gusta ir a la escuela
The correct way to answer
Spanish Ques; te gusta ir a la escuela?
Ans; si, me gusta ir a la escuela.
English Ques; You like go to school?
Ans; I enjoy going to school.
Where spanish language is spoken?
Along with Spain in Europe and Equatorial Guinea in Africa, Spanish is the official language of 18 nations in the Americas (Venezuela, El Salvador, Ecuador, Bolivia, Chile, Colombia, Costa Rica, Cuba, Dominican Republic, Mexico, Nicaragua, Panama, Paraguay, and Uruguay.)
Twenty different countries have made Spanish their official language.
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Whta is a major difference between the rutherford and the wave mechnaical models of the atom?
A major difference between the Rutherford atomic model and the Wave mechanical model of atom is that Rutherford model was based on the gold foil experiment which considered only the particle properties of atoms whereas the wave mechanical model considers the particle properties and the wave properties of atoms.
Rutherford atomic model was given by Ernest Rutherford to explain what an atom is. His gold foil experiment showed that atom is mostly empty space with, small, dense, positively-charged nucleus.
Wave mechanical model was given by Thomas Young. He called the experiment as Double-slit experiment, to test the nature of the light. Young discovered that electrons of the atom exhibited the particle-wave dual properties which led to this theory named as wave mechanical theory of an atom.
These theories explain different properties of atoms with the help of different experiments.
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How can cells be in osmotic equilibrium but chemical and electrical disequilibrium?
Cells be in osmotic equilibrium but chemical and electrical disequilibrium because water moves freely between most cells and the extracellular fluid
When the concentrations are equal on both sides of the membrane called osmotic equilibrium in cell this results in zero osmotic pressure as there is no force needed to prevent any flow. in other words, the tonicity is the same on both sides of the membrane. by diffusion of water or solutes, osmotic balance ensures that optimal concentrations of electrolytes and non-electrolytes are maintained in cells in this method osmosis maintain equilibrium in the cell not chemical and electrical equilibrium that's why osmotic equilibrium in the cell but chemical and electrical disequilibrium in the cell.
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A grignard synthesis begins with 6.00 g of bromobenzene and ends with 3.94 g benzoic acid. what is the percent yield of the benzoic acid? assume all other reagents are in excess.
6.00 g of bromobenzene and 3.94 g of benzoic acid are used in a grignard synthesis. 84.4% of the yield of benzoic acid is produced.
Given:
Grignard synthesis begins with
Bromobenzene = 6 g
to Benzoic acid = 3.94 g
122 g of benzoic acid would be generated from 157 g of bromobenzene.
As a result, 6 g of bromobenzene will result in
Then,
= 122 / 157 × 6
= 4.66g
3.94 is prepared then,
The percentage will be
(3.94/4.66) x 100 = 84.4 percent
An organomagnesium halide with the formula RMgX is a Grignard reagent, and in it, X is a halogen (-Cl, -Br, or -I), and R is an alkyl or aryl group (based on a benzene ring) group. A Grignard reagent is used to start a Grignard reaction, which produces a secondary or tertiary alcohol from a ketone or aldehyde.
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what mass of ammonium thiocyanate must be used if it is to react completely with 6.7 g barium hydroxide octahydrate?
Mass of ammonium thiocyanate must be used if it is to react completely with 6.7 g barium hydroxide octahydrate is 3.14g.
What is ammonium thiocyanate?Ammonium thiocyanate is an inorganic compound with formula NH4SCN. It is salt of the ammonium cation and the thiocyanate anion.
Ammonium thiocyanate is used in manufacture of herbicides, thiourea, and transparent artificial resins; in matches; as a stabilizing agent in photography; in various rustproofing compositions; as adjuvant in textile dyeing and printing; as a tracer in oil fields; in separation of hafnium from zirconium (important for the production of hafnium-free zircalloy for use in nuclear fuel cladding), and in titrimetric analyses.
Ammonium thiocyanate can also be used to determine iron content in soft drinks by colorimetry.
Ammonium thiocyanate may also be used to separate the quinidine, from liquors, after the isolation of quinine from the neutral, aqueous, sulphate solution. The salt is added to hot solution and the gummy solid that forms is strained off from the liquid. The solid is then refluxed with methanol, which dissolves most of mpurities, leaving the quinidine thiocyanate as a crystalline solid of 90 - 95% purity. Following the separation, (usually by centrifuge) the solid may then be further purified to pharmaceutical quality. (Quinidine is used for treatment of heart arrhythmia and therefore has considerable value.)
Ammonium thiocyanate = NH4SCN
Barium hydroxide octahydrate = Ba(OH)2 · 8H2O
Solution:
The Balanced chemical equation:
2NH4SCN + Ba(OH)2 · 8H2O → Ba(SCN)2 + 2NH3 + 10H2O
According to equation above: n[NH4SCN]/2 = n[Ba(OH)2 · 8H2O]
Molar mass of Ba(OH)2 · 8H2O is 315.46 g/mol.
Hence,
n[Ba(OH)2 · 8H2O] = (6.5 g) × (1 mol / 315.46 g) = 0.020605 mol
n[NH4SCN] = 2 × n[Ba(OH)2 · 8H2O] = 2 × 0.020605 mol = 0.04121 mol
Molar mass of NH4SCN is 76.122 g/mol.
Hence, mass of NH4SCN will be:
m(NH4SCN) = (0.04121 mol NH4SCN) × (76.122 g NH4SCN / 1 mol NH4SCN) = 3.137 g NH4SCN
Mass of the NH4SCN = 3.137 g = 3.14 g
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what is the overall charge of the most abundant tripeptide species at neutral ph (ph 7.0)? enter your answer as a whole numbe
The most abundant tripeptide species at neutral ph (ph 7.0) the overall charge 0
A peptide consisting of three amino acids. a tripeptide is a peptide derived from three amino acids joined by two or sometimes three peptide bonds function of peptides is determined by the constituent amino acids and their sequence Glutathione (γ-glutamyl-cysteinyl-glycine) is the example of tripeptide called tripeptide. here at 7 ph the overall charge of the most abundant tripeptide species is 0 because at 7 ph means it is in neutral condition so net charge is 0
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Phosphorus-32 has a half-life of 14.0 daysdays. starting with 2.00 gg of 32p32p, how many grams will remain after 112 daysdays pearson?
By the half-life of radioactive, the remaining mass of radioactive elements is 7.8125 x 10¯³ gram.
We need to know about the half-life of the radioactive elements to solve this problem. The radioactive element will decay over time and follow the equation
N = No(1/2)^(t/t'')
where N is the final quantity, No is the initial quantity, λ is the decaying constant, t is time and t'' is the half-life of a radioactive element.
From the question above, we know that
t'' = 14 days
No = 2 grams
t = 112 days
Calculate the remaining mass
N = No(1/2)^(t/t'')
N = 2(1/2)^(112 / 14)
N = 7.8125 x 10¯³ gram
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Which isotope has a longer half-life? select the correct answer and explanation.
Xenon-124 isotope has a longer half life.
The duration needed for a quantity to decrease to half of its initial value is known as the half-life.One of those isotopes whose half life are longer is xenon 124, whose half-life has been calculated by experts to be 18 sextillion years due to its disintegration into tellurium 124.Half-life does not imply that atoms degrade at a constant rate. The figure simply represents the time it will take, on average, for the majority of a radioactive element to diminish itself by half.While the majority of xenon isotopes have half-lives of less than 12 days, Xenon-124 is believed to have extraordinarily long half-lives and to be fundamentally stable.These decays, which are the rarest processes ever directly recorded, have been detected in the XENON1T detector in 2019.Thus Xenon-124 has highest half life.
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classify each reactant and product in this reaction as an acid or base according to the brønsted theory. hf h2o↽−−⇀f− h3o
Bronsted-lowry theory does not define acid and bases particularly but they particularly tell how they react or act in the given chemical reaction.
Bronsted-Lowry theory are also known as proton theory of acids and bases.
From the given reaction, HF contribute a proton, in the form of an H+ atom, to water H2O, producing the fluoride F− and hydronium H3O+ ions. The reactant side of Bronsted-Lowry acid is :
Bronsted−Lowry acid: HF
On the other hand the Bronsted-Lowry base is
Bronsted−Lowry base : H2O
Meanwhile, the particle on the product side that same after the Bronsted-Lowry acid contribute a proton to the Bronsted-Lowry base is called a conjugate base (are able to take a proton) while the persist particles taking a proton is the conjugate acid (are able to contribute a proton). Hence,
Bronsted−Lowry acid : H3O + Bronsted−Lowry base : F−
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colligative properties are properties of a solution that depend only on the of solute particles in a given volume of solution, not on their .
Colligative properties are properties of a solution that depend only on the number of solute particles in a given volume of solution, not on their type.
What are Colligative properties?
Colligative properties of solutions are characteristics that depend on the quantity of molecules or ions in the solute, but not on the kind of solute. Osmotic pressure, boiling point elevation, freezing point depression, and vapor pressure reduction are examples of Colligative properties.
A property of a solution is said to be collative if it depends simply on the proportion of solute to solvent particles in the solution and not on the nature of the solute.
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Complete and balance the following redox reaction in basic solution. zn(s)=zn(oh)42-(aq) h2(g)
The Balanced redox reaction is:
[tex]2H_2O + Zn (s) + 2OH^- \rightarrow Zn(OH)_4^2^- (aq) + H_2 (g)[/tex]
In that total redox reaction,
one half reaction of cell is [tex]Zn \rightarrow Zn^2^+ + 2e^-[/tex]
the other reaction is [tex]2OH^- + 2e^- + 2H_2O \rightarrow H_2 + 4OH^-[/tex]
Redox reactions are balanced in basic solution just as they would be in acid. You utilize [tex]OH^-[/tex] for conversion to base at the end.
The steps for balancing a redox reaction in a basic solution are as follows:
1. Split the reaction into half reactions.
2. Balance the other elements, except H and O.
3. By adding water, the O atoms are balanced.
4. By adding [tex]H^+[/tex], balance the H atoms.
5. To remove any [tex]H^+[/tex], add [tex]OH^-[/tex] ions to both sides.
6. To create [tex]H_2O[/tex], combine [tex]H^+[/tex] and [tex]OH^-[/tex].
7. Make things simpler by removing extra water.
8. Equalize the charges by including [tex]e^-[/tex]
9. Combine the half reactions, then simplify.
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What mass of co2 is produced when 25.00 ml sample of ethanol (density = 0.789 g/ml) combusts?
The mass of CO2 gas is 19.725 grams when a 25.00 ml sample of ethanol with a density of 0.789 g/ml combusts.
What is Density?Density may be defined as a type of physical property that significantly deals with the description of how much space an object or substance takes up with respect to the amount of matter in that object or substance.
In a more simple sense, it is characterized as the measurement of quantity or mass per unit of volume in a particular substance.
According to the question,
The mass of the CO2 = ?
The density of the CO2 gas = 0.789 g/ml.
The volume of CO2 gas = 25.00 ml.
The formula for calculating the density is as follows:
Density = Mass/Volume.Mass = Density × Volume.= 0.789 g/ml × 25.00 ml. = 19.725 grams.
Therefore, the mass of CO2 gas is 19.725 grams when a 25.00 ml sample of ethanol with a density of 0.789 g/ml combusts.
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mass = 10g
volume = 25mL
Find the density, Remember: density = mass/volume
Answer: p = 4.0E-7 g/cm^3
Look at the image. The velocity between point A and point B is
m/s. Only use one decimal point. (3.0, 1.2, 0.9, etc.)
The velocity between point A and point B is 1.0 m/s
How to determine the velocity between point A and point B
What is velocity?
Velocity is simply defined as the rate of change of displacement with time. Mathematically, it can be expressed as:
Velocity = Change of displacement / time
From the question given above, the following data were obtained:
Displacement at A = 0 mDisplacement at B = 8 mChange of displacement = 8 - 0 = 8 mTime at A = 0 sTime at B = 8 sChange in time = 8 - 0 = 8 s Velocity =?The velocity between point A and point B can be obtained as follow:
Velocity = Change of displacement / time
Velocity = 8 / 8
Velocity = 1.0 m/s
Thus, the velocity between point A and point B is 1.0 m/s
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In the preparation of primary amines, how can direct nucleophilic substitution between nh3 and alkyl halide be made more practical than reacting nh3 and the alkyl halide in a 1:1 ratio?
Direct nucleophilic substitution between NH₃ and alkyl halide be made more practical than reacting NH₃ and the alkyl halide in a 1:1 ratio By Using a large excess of NH₃.
Why is direct nucleophilic substitution of an haloalkane with NH₃ not a very useful method for preparing primary amines?
Polyalkylation of the amine will end in multiple products
What happens when haloalkane reacts with NH₃?Ch₂₂: RX + NH₃. Ammonia reacts as a nucleophile with alkyl halides to offer primary amines in a nucleophilic substitution reaction. Yields are often poor because the product, a primary amine, RNH₂, is itself a nucleophile and may react with more alkyl halide.
Is NH₃ a robust nucleophile?
NH₃(Ammonia) has the stronger nucleophilic character than water molecule. Because the Oxygen within the water molecule doesn't likely to bond with any carbon atom compared to Nitrogen atom. Since Oxygen has more electronegativity than Nitrogen. Hence it holds onto its lone pair tightly than Nitrogen.
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icolaou, k. c.;montagnon, t.; baran, p. s.; zhong, y.-l. iodine (v) reagents inorganic synthesis. part 4. o-iodoxybenxoic acid as a chemospecifictool for single electron transfer-based oxidation processes.j. am.chem. soc.2002,124, 2245.
Oxygen is a good oxidant because it has the highest electronegativity, which is 3.44.
What is an oxidant ?A reactant that oxidizes or eliminates electrons from other reactants in a redox reaction is referred to as an oxidant. An oxidizer, oxidizing agent, or oxidant are several terms for the same thing. An oxygenation reagent or oxygen-atom transfer (OT) agent is a term that may be used to describe an oxidant that contains oxygen.
The loss of electrons in oxidation (OIL RIG). A material that oxidizes therefore steals electrons from the other substance. As a result, an oxidizing agent needs to pick up electrons.
Flourine is the most effective oxidizer. The highest positive electrode potential value is present in it. Halogens function as a potent oxidizing agent because of their high electronegativity and electron affinity.
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Of the following, which atom has the smallest atomic radius?
a. sr
b. po
c. te
d. ba
The atom that has the smallest atomic radius is Tellurium(Te).
The modern periodic table contains 118 elements which have been divided into 18 groups horizontally and 7 periods vertically, as shown in the adjoining diagram.
In the second diagram, the trends that vary across periods and groups are shown.
We can see that the atomic radius increases on going down the group in the periodic table and decreases on moving left to right.
We have to compare the radius of the following four elements:
Strontium Sr (Group 2, Period 5)
Polonium Po (Group 16, Period 6)
Tellurium Te (Group 16, Period 5)
Barium Ba (Group 2, Period 6)
Among the above elements, Tellurium has the smallest atomic radius according to the trends in the periodic table.
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